tools/testing/selftests/nolibc/nolibc-test.c

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #define _GNU_SOURCE
   4 #define _LARGEFILE64_SOURCE
   5
   6 /* libc-specific include files
   7  * The program may be built in 3 ways:
   8  *   $(CC) -nostdlib -include /path/to/nolibc.h => NOLIBC already defined
   9  *   $(CC) -nostdlib -I/path/to/nolibc/sysroot  => _NOLIBC_* guards are present
  10  *   $(CC) with default libc                    => NOLIBC* never defined
  11  */
  12 #ifndef NOLIBC
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #ifndef _NOLIBC_STDIO_H
  17 /* standard libcs need more includes */
  18 #include <sys/io.h>
  19 #include <sys/ioctl.h>
  20 #include <sys/mman.h>
  21 #include <sys/mount.h>
  22 #include <sys/prctl.h>
  23 #include <sys/reboot.h>
  24 #include <sys/stat.h>
  25 #include <sys/syscall.h>
  26 #include <sys/sysmacros.h>
  27 #include <sys/time.h>
  28 #include <sys/wait.h>
  29 #include <dirent.h>
  30 #include <errno.h>
  31 #include <fcntl.h>
  32 #include <poll.h>
  33 #include <sched.h>
  34 #include <signal.h>
  35 #include <stdarg.h>
  36 #include <stddef.h>
  37 #include <stdint.h>
  38 #include <unistd.h>
  39 #include <limits.h>
  40 #endif
  41 #endif
  42
  43 /* for the type of int_fast16_t and int_fast32_t, musl differs from glibc and nolibc */
  44 #define SINT_MAX_OF_TYPE(type) (((type)1 << (sizeof(type) * 8 - 2)) - (type)1 + ((type)1 << (sizeof(type) * 8 - 2)))
  45 #define SINT_MIN_OF_TYPE(type) (-SINT_MAX_OF_TYPE(type) - 1)
  46
  47 /* will be used by nolibc by getenv() */
  48 char **environ;
  49
  50 /* will be used by some test cases as readable file, please don't write it */
  51 static const char *argv0;
  52
  53 /* definition of a series of tests */
  54 struct test {
  55         const char *name;              /* test name */
  56         int (*func)(int min, int max); /* handler */
  57 };
  58
  59 #ifndef _NOLIBC_STDLIB_H
  60 char *itoa(int i)
  61 {
  62         static char buf[12];
  63         int ret;
  64
  65         ret = snprintf(buf, sizeof(buf), "%d", i);
  66         return (ret >= 0 && ret < sizeof(buf)) ? buf : "#err";
  67 }
  68 #endif
  69
  70 #define CASE_ERR(err) \
  71         case err: return #err
  72
  73 /* returns the error name (e.g. "ENOENT") for common errors, "SUCCESS" for 0,
  74  * or the decimal value for less common ones.
  75  */
  76 const char *errorname(int err)
  77 {
  78         switch (err) {
  79         case 0: return "SUCCESS";
  80         CASE_ERR(EPERM);
  81         CASE_ERR(ENOENT);
  82         CASE_ERR(ESRCH);
  83         CASE_ERR(EINTR);
  84         CASE_ERR(EIO);
  85         CASE_ERR(ENXIO);
  86         CASE_ERR(E2BIG);
  87         CASE_ERR(ENOEXEC);
  88         CASE_ERR(EBADF);
  89         CASE_ERR(ECHILD);
  90         CASE_ERR(EAGAIN);
  91         CASE_ERR(ENOMEM);
  92         CASE_ERR(EACCES);
  93         CASE_ERR(EFAULT);
  94         CASE_ERR(ENOTBLK);
  95         CASE_ERR(EBUSY);
  96         CASE_ERR(EEXIST);
  97         CASE_ERR(EXDEV);
  98         CASE_ERR(ENODEV);
  99         CASE_ERR(ENOTDIR);
 100         CASE_ERR(EISDIR);
 101         CASE_ERR(EINVAL);
 102         CASE_ERR(ENFILE);
 103         CASE_ERR(EMFILE);
 104         CASE_ERR(ENOTTY);
 105         CASE_ERR(ETXTBSY);
 106         CASE_ERR(EFBIG);
 107         CASE_ERR(ENOSPC);
 108         CASE_ERR(ESPIPE);
 109         CASE_ERR(EROFS);
 110         CASE_ERR(EMLINK);
 111         CASE_ERR(EPIPE);
 112         CASE_ERR(EDOM);
 113         CASE_ERR(ERANGE);
 114         CASE_ERR(ENOSYS);
 115         CASE_ERR(EOVERFLOW);
 116         default:
 117                 return itoa(err);
 118         }
 119 }
 120
 121 static void putcharn(char c, size_t n)
 122 {
 123         char buf[64];
 124
 125         memset(buf, c, n);
 126         buf[n] = '\0';
 127         fputs(buf, stdout);
 128 }
 129
 130 static int pad_spc(int llen, int cnt, const char *fmt, ...)
 131 {
 132         va_list args;
 133         int ret;
 134
 135         putcharn(' ', cnt - llen);
 136
 137         va_start(args, fmt);
 138         ret = vfprintf(stdout, fmt, args);
 139         va_end(args);
 140         return ret < 0 ? ret : ret + cnt - llen;
 141 }
 142
 143 /* The tests below are intended to be used by the macroes, which evaluate
 144  * expression <expr>, print the status to stdout, and update the "ret"
 145  * variable to count failures. The functions themselves return the number
 146  * of failures, thus either 0 or 1.
 147  */
 148
 149 #define EXPECT_ZR(cond, expr)                           \
 150         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_zr(expr, llen); } while (0)
 151
 152 static int expect_zr(int expr, int llen)
 153 {
 154         int ret = !(expr == 0);
 155
 156         llen += printf(" = %d ", expr);
 157         pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n");
 158         return ret;
 159 }
 160
 161
 162 #define EXPECT_NZ(cond, expr, val)                      \
 163         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_nz(expr, llen; } while (0)
 164
 165 static int expect_nz(int expr, int llen)
 166 {
 167         int ret = !(expr != 0);
 168
 169         llen += printf(" = %d ", expr);
 170         pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n");
 171         return ret;
 172 }
 173
 174
 175 #define EXPECT_EQ(cond, expr, val)                              \
 176         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_eq(expr, llen, val); } while (0)
 177
 178 static int expect_eq(uint64_t expr, int llen, uint64_t val)
 179 {
 180         int ret = !(expr == val);
 181
 182         llen += printf(" = %lld ", (long long)expr);
 183         pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n");
 184         return ret;
 185 }
 186
 187
 188 #define EXPECT_NE(cond, expr, val)                              \
 189         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ne(expr, llen, val); } while (0)
 190
 191 static int expect_ne(int expr, int llen, int val)
 192 {
 193         int ret = !(expr != val);
 194
 195         llen += printf(" = %d ", expr);
 196         pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n");
 197         return ret;
 198 }
 199
 200
 201 #define EXPECT_GE(cond, expr, val)                              \
 202         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ge(expr, llen, val); } while (0)
 203
 204 static int expect_ge(int expr, int llen, int val)
 205 {
 206         int ret = !(expr >= val);
 207
 208         llen += printf(" = %d ", expr);
 209         pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n");
 210         return ret;
 211 }
 212
 213
 214 #define EXPECT_GT(cond, expr, val)                              \
 215         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_gt(expr, llen, val); } while (0)
 216
 217 static int expect_gt(int expr, int llen, int val)
 218 {
 219         int ret = !(expr > val);
 220
 221         llen += printf(" = %d ", expr);
 222         pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n");
 223         return ret;
 224 }
 225
 226
 227 #define EXPECT_LE(cond, expr, val)                              \
 228         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_le(expr, llen, val); } while (0)
 229
 230 static int expect_le(int expr, int llen, int val)
 231 {
 232         int ret = !(expr <= val);
 233
 234         llen += printf(" = %d ", expr);
 235         pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n");
 236         return ret;
 237 }
 238
 239
 240 #define EXPECT_LT(cond, expr, val)                              \
 241         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_lt(expr, llen, val); } while (0)
 242
 243 static int expect_lt(int expr, int llen, int val)
 244 {
 245         int ret = !(expr < val);
 246
 247         llen += printf(" = %d ", expr);
 248         pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n");
 249         return ret;
 250 }
 251
 252
 253 #define EXPECT_SYSZR(cond, expr)                                \
 254         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_syszr(expr, llen); } while (0)
 255
 256 static int expect_syszr(int expr, int llen)
 257 {
 258         int ret = 0;
 259
 260         if (expr) {
 261                 ret = 1;
 262                 llen += printf(" = %d %s ", expr, errorname(errno));
 263                 llen += pad_spc(llen, 64, "[FAIL]\n");
 264         } else {
 265                 llen += printf(" = %d ", expr);
 266                 llen += pad_spc(llen, 64, " [OK]\n");
 267         }
 268         return ret;
 269 }
 270
 271
 272 #define EXPECT_SYSEQ(cond, expr, val)                           \
 273         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_syseq(expr, llen, val); } while (0)
 274
 275 static int expect_syseq(int expr, int llen, int val)
 276 {
 277         int ret = 0;
 278
 279         if (expr != val) {
 280                 ret = 1;
 281                 llen += printf(" = %d %s ", expr, errorname(errno));
 282                 llen += pad_spc(llen, 64, "[FAIL]\n");
 283         } else {
 284                 llen += printf(" = %d ", expr);
 285                 llen += pad_spc(llen, 64, " [OK]\n");
 286         }
 287         return ret;
 288 }
 289
 290
 291 #define EXPECT_SYSNE(cond, expr, val)                           \
 292         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_sysne(expr, llen, val); } while (0)
 293
 294 static int expect_sysne(int expr, int llen, int val)
 295 {
 296         int ret = 0;
 297
 298         if (expr == val) {
 299                 ret = 1;
 300                 llen += printf(" = %d %s ", expr, errorname(errno));
 301                 llen += pad_spc(llen, 64, "[FAIL]\n");
 302         } else {
 303                 llen += printf(" = %d ", expr);
 304                 llen += pad_spc(llen, 64, " [OK]\n");
 305         }
 306         return ret;
 307 }
 308
 309
 310 #define EXPECT_SYSER2(cond, expr, expret, experr1, experr2)             \
 311         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_syserr2(expr, expret, experr1, experr2, llen); } while (0)
 312
 313 #define EXPECT_SYSER(cond, expr, expret, experr)                        \
 314         EXPECT_SYSER2(cond, expr, expret, experr, 0)
 315
 316 static int expect_syserr2(int expr, int expret, int experr1, int experr2, int llen)
 317 {
 318         int ret = 0;
 319         int _errno = errno;
 320
 321         llen += printf(" = %d %s ", expr, errorname(_errno));
 322         if (expr != expret || (_errno != experr1 && _errno != experr2)) {
 323                 ret = 1;
 324                 if (experr2 == 0)
 325                         llen += printf(" != (%d %s) ", expret, errorname(experr1));
 326                 else
 327                         llen += printf(" != (%d %s %s) ", expret, errorname(experr1), errorname(experr2));
 328                 llen += pad_spc(llen, 64, "[FAIL]\n");
 329         } else {
 330                 llen += pad_spc(llen, 64, " [OK]\n");
 331         }
 332         return ret;
 333 }
 334
 335
 336 #define EXPECT_PTRZR(cond, expr)                                \
 337         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ptrzr(expr, llen); } while (0)
 338
 339 static int expect_ptrzr(const void *expr, int llen)
 340 {
 341         int ret = 0;
 342
 343         llen += printf(" = <%p> ", expr);
 344         if (expr) {
 345                 ret = 1;
 346                 llen += pad_spc(llen, 64, "[FAIL]\n");
 347         } else {
 348                 llen += pad_spc(llen, 64, " [OK]\n");
 349         }
 350         return ret;
 351 }
 352
 353
 354 #define EXPECT_PTRNZ(cond, expr)                                \
 355         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ptrnz(expr, llen); } while (0)
 356
 357 static int expect_ptrnz(const void *expr, int llen)
 358 {
 359         int ret = 0;
 360
 361         llen += printf(" = <%p> ", expr);
 362         if (!expr) {
 363                 ret = 1;
 364                 llen += pad_spc(llen, 64, "[FAIL]\n");
 365         } else {
 366                 llen += pad_spc(llen, 64, " [OK]\n");
 367         }
 368         return ret;
 369 }
 370
 371 #define EXPECT_PTREQ(cond, expr, cmp)                           \
 372         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ptreq(expr, llen, cmp); } while (0)
 373
 374 static int expect_ptreq(const void *expr, int llen, const void *cmp)
 375 {
 376         int ret = 0;
 377
 378         llen += printf(" = <%p> ", expr);
 379         if (expr != cmp) {
 380                 ret = 1;
 381                 llen += pad_spc(llen, 64, "[FAIL]\n");
 382         } else {
 383                 llen += pad_spc(llen, 64, " [OK]\n");
 384         }
 385         return ret;
 386 }
 387
 388 #define EXPECT_PTRNE(cond, expr, cmp)                           \
 389         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ptrne(expr, llen, cmp); } while (0)
 390
 391 static int expect_ptrne(const void *expr, int llen, const void *cmp)
 392 {
 393         int ret = 0;
 394
 395         llen += printf(" = <%p> ", expr);
 396         if (expr == cmp) {
 397                 ret = 1;
 398                 llen += pad_spc(llen, 64, "[FAIL]\n");
 399         } else {
 400                 llen += pad_spc(llen, 64, " [OK]\n");
 401         }
 402         return ret;
 403 }
 404
 405 #define EXPECT_PTRER2(cond, expr, expret, experr1, experr2)             \
 406         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ptrerr2(expr, expret, experr1, experr2, llen); } while (0)
 407
 408 #define EXPECT_PTRER(cond, expr, expret, experr)                        \
 409         EXPECT_PTRER2(cond, expr, expret, experr, 0)
 410
 411 static int expect_ptrerr2(const void *expr, const void *expret, int experr1, int experr2, int llen)
 412 {
 413         int ret = 0;
 414         int _errno = errno;
 415
 416         llen += printf(" = <%p> %s ", expr, errorname(_errno));
 417         if (expr != expret || (_errno != experr1 && _errno != experr2)) {
 418                 ret = 1;
 419                 if (experr2 == 0)
 420                         llen += printf(" != (<%p> %s) ", expret, errorname(experr1));
 421                 else
 422                         llen += printf(" != (<%p> %s %s) ", expret, errorname(experr1), errorname(experr2));
 423                 llen += pad_spc(llen, 64, "[FAIL]\n");
 424         } else {
 425                 llen += pad_spc(llen, 64, " [OK]\n");
 426         }
 427         return ret;
 428 }
 429
 430 #define EXPECT_STRZR(cond, expr)                                \
 431         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_strzr(expr, llen); } while (0)
 432
 433 static int expect_strzr(const char *expr, int llen)
 434 {
 435         int ret = 0;
 436
 437         llen += printf(" = <%s> ", expr);
 438         if (expr) {
 439                 ret = 1;
 440                 llen += pad_spc(llen, 64, "[FAIL]\n");
 441         } else {
 442                 llen += pad_spc(llen, 64, " [OK]\n");
 443         }
 444         return ret;
 445 }
 446
 447
 448 #define EXPECT_STRNZ(cond, expr)                                \
 449         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_strnz(expr, llen); } while (0)
 450
 451 static int expect_strnz(const char *expr, int llen)
 452 {
 453         int ret = 0;
 454
 455         llen += printf(" = <%s> ", expr);
 456         if (!expr) {
 457                 ret = 1;
 458                 llen += pad_spc(llen, 64, "[FAIL]\n");
 459         } else {
 460                 llen += pad_spc(llen, 64, " [OK]\n");
 461         }
 462         return ret;
 463 }
 464
 465
 466 #define EXPECT_STREQ(cond, expr, cmp)                           \
 467         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_streq(expr, llen, cmp); } while (0)
 468
 469 static int expect_streq(const char *expr, int llen, const char *cmp)
 470 {
 471         int ret = 0;
 472
 473         llen += printf(" = <%s> ", expr);
 474         if (strcmp(expr, cmp) != 0) {
 475                 ret = 1;
 476                 llen += pad_spc(llen, 64, "[FAIL]\n");
 477         } else {
 478                 llen += pad_spc(llen, 64, " [OK]\n");
 479         }
 480         return ret;
 481 }
 482
 483
 484 #define EXPECT_STRNE(cond, expr, cmp)                           \
 485         do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_strne(expr, llen, cmp); } while (0)
 486
 487 static int expect_strne(const char *expr, int llen, const char *cmp)
 488 {
 489         int ret = 0;
 490
 491         llen += printf(" = <%s> ", expr);
 492         if (strcmp(expr, cmp) == 0) {
 493                 ret = 1;
 494                 llen += pad_spc(llen, 64, "[FAIL]\n");
 495         } else {
 496                 llen += pad_spc(llen, 64, " [OK]\n");
 497         }
 498         return ret;
 499 }
 500
 501
 502 /* declare tests based on line numbers. There must be exactly one test per line. */
 503 #define CASE_TEST(name) \
 504         case __LINE__: llen += printf("%d %s", test, #name);
 505
 506
 507 /* used by some syscall tests below */
 508 int test_getdents64(const char *dir)
 509 {
 510         char buffer[4096];
 511         int fd, ret;
 512         int err;
 513
 514         ret = fd = open(dir, O_RDONLY | O_DIRECTORY, 0);
 515         if (ret < 0)
 516                 return ret;
 517
 518         ret = getdents64(fd, (void *)buffer, sizeof(buffer));
 519         err = errno;
 520         close(fd);
 521
 522         errno = err;
 523         return ret;
 524 }
 525
 526 static int test_getpagesize(void)
 527 {
 528         long x = getpagesize();
 529         int c;
 530
 531         if (x < 0)
 532                 return x;
 533
 534 #if defined(__x86_64__) || defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__)
 535         /*
 536          * x86 family is always 4K page.
 537          */
 538         c = (x == 4096);
 539 #elif defined(__aarch64__)
 540         /*
 541          * Linux aarch64 supports three values of page size: 4K, 16K, and 64K
 542          * which are selected at kernel compilation time.
 543          */
 544         c = (x == 4096 || x == (16 * 1024) || x == (64 * 1024));
 545 #else
 546         /*
 547          * Assuming other architectures must have at least 4K page.
 548          */
 549         c = (x >= 4096);
 550 #endif
 551
 552         return !c;
 553 }
 554
 555 static int test_fork(void)
 556 {
 557         int status;
 558         pid_t pid;
 559
 560         /* flush the printf buffer to avoid child flush it */
 561         fflush(stdout);
 562         fflush(stderr);
 563
 564         pid = fork();
 565
 566         switch (pid) {
 567         case -1:
 568                 return 1;
 569
 570         case 0:
 571                 exit(123);
 572
 573         default:
 574                 pid = waitpid(pid, &status, 0);
 575
 576                 return pid == -1 || !WIFEXITED(status) || WEXITSTATUS(status) != 123;
 577         }
 578 }
 579
 580 static int test_stat_timestamps(void)
 581 {
 582         struct stat st;
 583
 584         if (sizeof(st.st_atim.tv_sec) != sizeof(st.st_atime))
 585                 return 1;
 586
 587         if (stat("/proc/self/", &st))
 588                 return 1;
 589
 590         if (st.st_atim.tv_sec != st.st_atime || st.st_atim.tv_nsec > 1000000000)
 591                 return 1;
 592
 593         if (st.st_mtim.tv_sec != st.st_mtime || st.st_mtim.tv_nsec > 1000000000)
 594                 return 1;
 595
 596         if (st.st_ctim.tv_sec != st.st_ctime || st.st_ctim.tv_nsec > 1000000000)
 597                 return 1;
 598
 599         return 0;
 600 }
 601
 602 int test_mmap_munmap(void)
 603 {
 604         int ret, fd, i;
 605         void *mem;
 606         size_t page_size, file_size, length;
 607         off_t offset, pa_offset;
 608         struct stat stat_buf;
 609         const char * const files[] = {
 610                 "/dev/zero",
 611                 "/proc/1/exe", "/proc/self/exe",
 612                 argv0,
 613                 NULL
 614         };
 615
 616         page_size = getpagesize();
 617         if (page_size < 0)
 618                 return -1;
 619
 620         /* find a right file to mmap, existed and accessible */
 621         for (i = 0; files[i] != NULL; i++) {
 622                 ret = fd = open(files[i], O_RDONLY);
 623                 if (ret == -1)
 624                         continue;
 625                 else
 626                         break;
 627         }
 628         if (ret == -1)
 629                 return ret;
 630
 631         ret = stat(files[i], &stat_buf);
 632         if (ret == -1)
 633                 goto end;
 634
 635         /* file size of the special /dev/zero is 0, let's assign one manually */
 636         if (i == 0)
 637                 file_size = 3*page_size;
 638         else
 639                 file_size = stat_buf.st_size;
 640
 641         offset = file_size - 1;
 642         if (offset < 0)
 643                 offset = 0;
 644         length = file_size - offset;
 645         pa_offset = offset & ~(page_size - 1);
 646
 647         mem = mmap(NULL, length + offset - pa_offset, PROT_READ, MAP_SHARED, fd, pa_offset);
 648         if (mem == MAP_FAILED) {
 649                 ret = -1;
 650                 goto end;
 651         }
 652
 653         ret = munmap(mem, length + offset - pa_offset);
 654
 655 end:
 656         close(fd);
 657         return ret;
 658 }
 659
 660
 661 /* Run syscall tests between IDs <min> and <max>.
 662  * Return 0 on success, non-zero on failure.
 663  */
 664 int run_syscall(int min, int max)
 665 {
 666         struct timeval tv;
 667         struct timezone tz;
 668         struct stat stat_buf;
 669         int euid0;
 670         int proc;
 671         int test;
 672         int tmp;
 673         int ret = 0;
 674         void *p1, *p2;
 675         int has_gettid = 1;
 676
 677         /* <proc> indicates whether or not /proc is mounted */
 678         proc = stat("/proc", &stat_buf) == 0;
 679
 680         /* this will be used to skip certain tests that can't be run unprivileged */
 681         euid0 = geteuid() == 0;
 682
 683         /* from 2.30, glibc provides gettid() */
 684 #if defined(__GLIBC_MINOR__) && defined(__GLIBC__)
 685         has_gettid = __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 30);
 686 #endif
 687
 688         for (test = min; test >= 0 && test <= max; test++) {
 689                 int llen = 0; /* line length */
 690
 691                 /* avoid leaving empty lines below, this will insert holes into
 692                  * test numbers.
 693                  */
 694                 switch (test + __LINE__ + 1) {
 695                 CASE_TEST(getpid);            EXPECT_SYSNE(1, getpid(), -1); break;
 696                 CASE_TEST(getppid);           EXPECT_SYSNE(1, getppid(), -1); break;
 697                 CASE_TEST(gettid);            EXPECT_SYSNE(has_gettid, gettid(), -1); break;
 698                 CASE_TEST(getpgid_self);      EXPECT_SYSNE(1, getpgid(0), -1); break;
 699                 CASE_TEST(getpgid_bad);       EXPECT_SYSER(1, getpgid(-1), -1, ESRCH); break;
 700                 CASE_TEST(kill_0);            EXPECT_SYSZR(1, kill(getpid(), 0)); break;
 701                 CASE_TEST(kill_CONT);         EXPECT_SYSZR(1, kill(getpid(), 0)); break;
 702                 CASE_TEST(kill_BADPID);       EXPECT_SYSER(1, kill(INT_MAX, 0), -1, ESRCH); break;
 703                 CASE_TEST(sbrk_0);            EXPECT_PTRNE(1, sbrk(0), (void *)-1); break;
 704                 CASE_TEST(sbrk);              if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(1, (p2 == (void *)-1) || p2 == p1); break;
 705                 CASE_TEST(brk);               EXPECT_SYSZR(1, brk(sbrk(0))); break;
 706                 CASE_TEST(chdir_root);        EXPECT_SYSZR(1, chdir("/")); break;
 707                 CASE_TEST(chdir_dot);         EXPECT_SYSZR(1, chdir(".")); break;
 708                 CASE_TEST(chdir_blah);        EXPECT_SYSER(1, chdir("/blah"), -1, ENOENT); break;
 709                 CASE_TEST(chmod_net);         EXPECT_SYSZR(proc, chmod("/proc/self/net", 0555)); break;
 710                 CASE_TEST(chmod_self);        EXPECT_SYSER(proc, chmod("/proc/self", 0555), -1, EPERM); break;
 711                 CASE_TEST(chown_self);        EXPECT_SYSER(proc, chown("/proc/self", 0, 0), -1, EPERM); break;
 712                 CASE_TEST(chroot_root);       EXPECT_SYSZR(euid0, chroot("/")); break;
 713                 CASE_TEST(chroot_blah);       EXPECT_SYSER(1, chroot("/proc/self/blah"), -1, ENOENT); break;
 714                 CASE_TEST(chroot_exe);        EXPECT_SYSER(proc, chroot("/proc/self/exe"), -1, ENOTDIR); break;
 715                 CASE_TEST(close_m1);          EXPECT_SYSER(1, close(-1), -1, EBADF); break;
 716                 CASE_TEST(close_dup);         EXPECT_SYSZR(1, close(dup(0))); break;
 717                 CASE_TEST(dup_0);             tmp = dup(0);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
 718                 CASE_TEST(dup_m1);            tmp = dup(-1); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
 719                 CASE_TEST(dup2_0);            tmp = dup2(0, 100);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
 720                 CASE_TEST(dup2_m1);           tmp = dup2(-1, 100); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
 721                 CASE_TEST(dup3_0);            tmp = dup3(0, 100, 0);  EXPECT_SYSNE(1, tmp, -1); close(tmp); break;
 722                 CASE_TEST(dup3_m1);           tmp = dup3(-1, 100, 0); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break;
 723                 CASE_TEST(execve_root);       EXPECT_SYSER(1, execve("/", (char*[]){ [0] = "/", [1] = NULL }, NULL), -1, EACCES); break;
 724                 CASE_TEST(fork);              EXPECT_SYSZR(1, test_fork()); break;
 725                 CASE_TEST(getdents64_root);   EXPECT_SYSNE(1, test_getdents64("/"), -1); break;
 726                 CASE_TEST(getdents64_null);   EXPECT_SYSER(1, test_getdents64("/dev/null"), -1, ENOTDIR); break;
 727                 CASE_TEST(gettimeofday_tv);   EXPECT_SYSZR(1, gettimeofday(&tv, NULL)); break;
 728                 CASE_TEST(gettimeofday_tv_tz);EXPECT_SYSZR(1, gettimeofday(&tv, &tz)); break;
 729                 CASE_TEST(getpagesize);       EXPECT_SYSZR(1, test_getpagesize()); break;
 730                 CASE_TEST(ioctl_tiocinq);     EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
 731                 CASE_TEST(ioctl_tiocinq);     EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break;
 732                 CASE_TEST(link_root1);        EXPECT_SYSER(1, link("/", "/"), -1, EEXIST); break;
 733                 CASE_TEST(link_blah);         EXPECT_SYSER(1, link("/proc/self/blah", "/blah"), -1, ENOENT); break;
 734                 CASE_TEST(link_dir);          EXPECT_SYSER(euid0, link("/", "/blah"), -1, EPERM); break;
 735                 CASE_TEST(link_cross);        EXPECT_SYSER(proc, link("/proc/self/net", "/blah"), -1, EXDEV); break;
 736                 CASE_TEST(lseek_m1);          EXPECT_SYSER(1, lseek(-1, 0, SEEK_SET), -1, EBADF); break;
 737                 CASE_TEST(lseek_0);           EXPECT_SYSER(1, lseek(0, 0, SEEK_SET), -1, ESPIPE); break;
 738                 CASE_TEST(mkdir_root);        EXPECT_SYSER(1, mkdir("/", 0755), -1, EEXIST); break;
 739                 CASE_TEST(mmap_bad);          EXPECT_PTRER(1, mmap(NULL, 0, PROT_READ, MAP_PRIVATE, 0, 0), MAP_FAILED, EINVAL); break;
 740                 CASE_TEST(munmap_bad);        EXPECT_SYSER(1, munmap((void *)1, 0), -1, EINVAL); break;
 741                 CASE_TEST(mmap_munmap_good);  EXPECT_SYSZR(1, test_mmap_munmap()); break;
 742                 CASE_TEST(open_tty);          EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break;
 743                 CASE_TEST(open_blah);         EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break;
 744                 CASE_TEST(poll_null);         EXPECT_SYSZR(1, poll(NULL, 0, 0)); break;
 745                 CASE_TEST(poll_stdout);       EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break;
 746                 CASE_TEST(poll_fault);        EXPECT_SYSER(1, poll((void *)1, 1, 0), -1, EFAULT); break;
 747                 CASE_TEST(prctl);             EXPECT_SYSER(1, prctl(PR_SET_NAME, (unsigned long)NULL, 0, 0, 0), -1, EFAULT); break;
 748                 CASE_TEST(read_badf);         EXPECT_SYSER(1, read(-1, &tmp, 1), -1, EBADF); break;
 749                 CASE_TEST(sched_yield);       EXPECT_SYSZR(1, sched_yield()); break;
 750                 CASE_TEST(select_null);       EXPECT_SYSZR(1, ({ struct timeval tv = { 0 }; select(0, NULL, NULL, NULL, &tv); })); break;
 751                 CASE_TEST(select_stdout);     EXPECT_SYSNE(1, ({ fd_set fds; FD_ZERO(&fds); FD_SET(1, &fds); select(2, NULL, &fds, NULL, NULL); }), -1); break;
 752                 CASE_TEST(select_fault);      EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break;
 753                 CASE_TEST(stat_blah);         EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break;
 754                 CASE_TEST(stat_fault);        EXPECT_SYSER(1, stat((void *)1, &stat_buf), -1, EFAULT); break;
 755                 CASE_TEST(stat_timestamps);   EXPECT_SYSZR(1, test_stat_timestamps()); break;
 756                 CASE_TEST(symlink_root);      EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break;
 757                 CASE_TEST(unlink_root);       EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break;
 758                 CASE_TEST(unlink_blah);       EXPECT_SYSER(1, unlink("/proc/self/blah"), -1, ENOENT); break;
 759                 CASE_TEST(wait_child);        EXPECT_SYSER(1, wait(&tmp), -1, ECHILD); break;
 760                 CASE_TEST(waitpid_min);       EXPECT_SYSER(1, waitpid(INT_MIN, &tmp, WNOHANG), -1, ESRCH); break;
 761                 CASE_TEST(waitpid_child);     EXPECT_SYSER(1, waitpid(getpid(), &tmp, WNOHANG), -1, ECHILD); break;
 762                 CASE_TEST(write_badf);        EXPECT_SYSER(1, write(-1, &tmp, 1), -1, EBADF); break;
 763                 CASE_TEST(write_zero);        EXPECT_SYSZR(1, write(1, &tmp, 0)); break;
 764                 CASE_TEST(syscall_noargs);    EXPECT_SYSEQ(1, syscall(__NR_getpid), getpid()); break;
 765                 CASE_TEST(syscall_args);      EXPECT_SYSER(1, syscall(__NR_statx, 0, NULL, 0, 0, NULL), -1, EFAULT); break;
 766                 case __LINE__:
 767                         return ret; /* must be last */
 768                 /* note: do not set any defaults so as to permit holes above */
 769                 }
 770         }
 771         return ret;
 772 }
 773
 774 int run_stdlib(int min, int max)
 775 {
 776         int test;
 777         int tmp;
 778         int ret = 0;
 779         void *p1, *p2;
 780
 781         for (test = min; test >= 0 && test <= max; test++) {
 782                 int llen = 0; /* line length */
 783
 784                 /* avoid leaving empty lines below, this will insert holes into
 785                  * test numbers.
 786                  */
 787                 switch (test + __LINE__ + 1) {
 788                 CASE_TEST(getenv_TERM);        EXPECT_STRNZ(1, getenv("TERM")); break;
 789                 CASE_TEST(getenv_blah);        EXPECT_STRZR(1, getenv("blah")); break;
 790                 CASE_TEST(setcmp_blah_blah);   EXPECT_EQ(1, strcmp("blah", "blah"), 0); break;
 791                 CASE_TEST(setcmp_blah_blah2);  EXPECT_NE(1, strcmp("blah", "blah2"), 0); break;
 792                 CASE_TEST(setncmp_blah_blah);  EXPECT_EQ(1, strncmp("blah", "blah", 10), 0); break;
 793                 CASE_TEST(setncmp_blah_blah4); EXPECT_EQ(1, strncmp("blah", "blah4", 4), 0); break;
 794                 CASE_TEST(setncmp_blah_blah5); EXPECT_NE(1, strncmp("blah", "blah5", 5), 0); break;
 795                 CASE_TEST(setncmp_blah_blah6); EXPECT_NE(1, strncmp("blah", "blah6", 6), 0); break;
 796                 CASE_TEST(strchr_foobar_o);    EXPECT_STREQ(1, strchr("foobar", 'o'), "oobar"); break;
 797                 CASE_TEST(strchr_foobar_z);    EXPECT_STRZR(1, strchr("foobar", 'z')); break;
 798                 CASE_TEST(strrchr_foobar_o);   EXPECT_STREQ(1, strrchr("foobar", 'o'), "obar"); break;
 799                 CASE_TEST(strrchr_foobar_z);   EXPECT_STRZR(1, strrchr("foobar", 'z')); break;
 800                 CASE_TEST(memcmp_20_20);       EXPECT_EQ(1, memcmp("aaa\x20", "aaa\x20", 4), 0); break;
 801                 CASE_TEST(memcmp_20_60);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\x60", 4), 0); break;
 802                 CASE_TEST(memcmp_60_20);       EXPECT_GT(1, memcmp("aaa\x60", "aaa\x20", 4), 0); break;
 803                 CASE_TEST(memcmp_20_e0);       EXPECT_LT(1, memcmp("aaa\x20", "aaa\xe0", 4), 0); break;
 804                 CASE_TEST(memcmp_e0_20);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x20", 4), 0); break;
 805                 CASE_TEST(memcmp_80_e0);       EXPECT_LT(1, memcmp("aaa\x80", "aaa\xe0", 4), 0); break;
 806                 CASE_TEST(memcmp_e0_80);       EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x80", 4), 0); break;
 807                 CASE_TEST(limit_int8_max);          EXPECT_EQ(1, INT8_MAX,         (int8_t)          0x7f); break;
 808                 CASE_TEST(limit_int8_min);          EXPECT_EQ(1, INT8_MIN,         (int8_t)          0x80); break;
 809                 CASE_TEST(limit_uint8_max);         EXPECT_EQ(1, UINT8_MAX,        (uint8_t)         0xff); break;
 810                 CASE_TEST(limit_int16_max);         EXPECT_EQ(1, INT16_MAX,        (int16_t)         0x7fff); break;
 811                 CASE_TEST(limit_int16_min);         EXPECT_EQ(1, INT16_MIN,        (int16_t)         0x8000); break;
 812                 CASE_TEST(limit_uint16_max);        EXPECT_EQ(1, UINT16_MAX,       (uint16_t)        0xffff); break;
 813                 CASE_TEST(limit_int32_max);         EXPECT_EQ(1, INT32_MAX,        (int32_t)         0x7fffffff); break;
 814                 CASE_TEST(limit_int32_min);         EXPECT_EQ(1, INT32_MIN,        (int32_t)         0x80000000); break;
 815                 CASE_TEST(limit_uint32_max);        EXPECT_EQ(1, UINT32_MAX,       (uint32_t)        0xffffffff); break;
 816                 CASE_TEST(limit_int64_max);         EXPECT_EQ(1, INT64_MAX,        (int64_t)         0x7fffffffffffffff); break;
 817                 CASE_TEST(limit_int64_min);         EXPECT_EQ(1, INT64_MIN,        (int64_t)         0x8000000000000000); break;
 818                 CASE_TEST(limit_uint64_max);        EXPECT_EQ(1, UINT64_MAX,       (uint64_t)        0xffffffffffffffff); break;
 819                 CASE_TEST(limit_int_least8_max);    EXPECT_EQ(1, INT_LEAST8_MAX,   (int_least8_t)    0x7f); break;
 820                 CASE_TEST(limit_int_least8_min);    EXPECT_EQ(1, INT_LEAST8_MIN,   (int_least8_t)    0x80); break;
 821                 CASE_TEST(limit_uint_least8_max);   EXPECT_EQ(1, UINT_LEAST8_MAX,  (uint_least8_t)   0xff); break;
 822                 CASE_TEST(limit_int_least16_max);   EXPECT_EQ(1, INT_LEAST16_MAX,  (int_least16_t)   0x7fff); break;
 823                 CASE_TEST(limit_int_least16_min);   EXPECT_EQ(1, INT_LEAST16_MIN,  (int_least16_t)   0x8000); break;
 824                 CASE_TEST(limit_uint_least16_max);  EXPECT_EQ(1, UINT_LEAST16_MAX, (uint_least16_t)  0xffff); break;
 825                 CASE_TEST(limit_int_least32_max);   EXPECT_EQ(1, INT_LEAST32_MAX,  (int_least32_t)   0x7fffffff); break;
 826                 CASE_TEST(limit_int_least32_min);   EXPECT_EQ(1, INT_LEAST32_MIN,  (int_least32_t)   0x80000000); break;
 827                 CASE_TEST(limit_uint_least32_max);  EXPECT_EQ(1, UINT_LEAST32_MAX, (uint_least32_t)  0xffffffffU); break;
 828                 CASE_TEST(limit_int_least64_min);   EXPECT_EQ(1, INT_LEAST64_MIN,  (int_least64_t)   0x8000000000000000LL); break;
 829                 CASE_TEST(limit_int_least64_max);   EXPECT_EQ(1, INT_LEAST64_MAX,  (int_least64_t)   0x7fffffffffffffffLL); break;
 830                 CASE_TEST(limit_uint_least64_max);  EXPECT_EQ(1, UINT_LEAST64_MAX, (uint_least64_t)  0xffffffffffffffffULL); break;
 831                 CASE_TEST(limit_int_fast8_max);     EXPECT_EQ(1, INT_FAST8_MAX,    (int_fast8_t)     0x7f); break;
 832                 CASE_TEST(limit_int_fast8_min);     EXPECT_EQ(1, INT_FAST8_MIN,    (int_fast8_t)     0x80); break;
 833                 CASE_TEST(limit_uint_fast8_max);    EXPECT_EQ(1, UINT_FAST8_MAX,   (uint_fast8_t)    0xff); break;
 834                 CASE_TEST(limit_int_fast16_min);    EXPECT_EQ(1, INT_FAST16_MIN,   (int_fast16_t)    SINT_MIN_OF_TYPE(int_fast16_t)); break;
 835                 CASE_TEST(limit_int_fast16_max);    EXPECT_EQ(1, INT_FAST16_MAX,   (int_fast16_t)    SINT_MAX_OF_TYPE(int_fast16_t)); break;
 836                 CASE_TEST(limit_uint_fast16_max);   EXPECT_EQ(1, UINT_FAST16_MAX,  (uint_fast16_t)   UINTPTR_MAX); break;
 837                 CASE_TEST(limit_int_fast32_min);    EXPECT_EQ(1, INT_FAST32_MIN,   (int_fast32_t)    SINT_MIN_OF_TYPE(int_fast32_t)); break;
 838                 CASE_TEST(limit_int_fast32_max);    EXPECT_EQ(1, INT_FAST32_MAX,   (int_fast32_t)    SINT_MAX_OF_TYPE(int_fast32_t)); break;
 839                 CASE_TEST(limit_uint_fast32_max);   EXPECT_EQ(1, UINT_FAST32_MAX,  (uint_fast32_t)   UINTPTR_MAX); break;
 840                 CASE_TEST(limit_int_fast64_min);    EXPECT_EQ(1, INT_FAST64_MIN,   (int_fast64_t)    INT64_MIN); break;
 841                 CASE_TEST(limit_int_fast64_max);    EXPECT_EQ(1, INT_FAST64_MAX,   (int_fast64_t)    INT64_MAX); break;
 842                 CASE_TEST(limit_uint_fast64_max);   EXPECT_EQ(1, UINT_FAST64_MAX,  (uint_fast64_t)   UINT64_MAX); break;
 843 #if __SIZEOF_LONG__ == 8
 844                 CASE_TEST(limit_intptr_min);        EXPECT_EQ(1, INTPTR_MIN,       (intptr_t)        0x8000000000000000LL); break;
 845                 CASE_TEST(limit_intptr_max);        EXPECT_EQ(1, INTPTR_MAX,       (intptr_t)        0x7fffffffffffffffLL); break;
 846                 CASE_TEST(limit_uintptr_max);       EXPECT_EQ(1, UINTPTR_MAX,      (uintptr_t)       0xffffffffffffffffULL); break;
 847                 CASE_TEST(limit_ptrdiff_min);       EXPECT_EQ(1, PTRDIFF_MIN,      (ptrdiff_t)       0x8000000000000000LL); break;
 848                 CASE_TEST(limit_ptrdiff_max);       EXPECT_EQ(1, PTRDIFF_MAX,      (ptrdiff_t)       0x7fffffffffffffffLL); break;
 849                 CASE_TEST(limit_size_max);          EXPECT_EQ(1, SIZE_MAX,         (size_t)          0xffffffffffffffffULL); break;
 850 #elif __SIZEOF_LONG__ == 4
 851                 CASE_TEST(limit_intptr_min);        EXPECT_EQ(1, INTPTR_MIN,       (intptr_t)        0x80000000); break;
 852                 CASE_TEST(limit_intptr_max);        EXPECT_EQ(1, INTPTR_MAX,       (intptr_t)        0x7fffffff); break;
 853                 CASE_TEST(limit_uintptr_max);       EXPECT_EQ(1, UINTPTR_MAX,      (uintptr_t)       0xffffffffU); break;
 854                 CASE_TEST(limit_ptrdiff_min);       EXPECT_EQ(1, PTRDIFF_MIN,      (ptrdiff_t)       0x80000000); break;
 855                 CASE_TEST(limit_ptrdiff_max);       EXPECT_EQ(1, PTRDIFF_MAX,      (ptrdiff_t)       0x7fffffff); break;
 856                 CASE_TEST(limit_size_max);          EXPECT_EQ(1, SIZE_MAX,         (size_t)          0xffffffffU); break;
 857 #else
 858 # warning "__SIZEOF_LONG__ is undefined"
 859 #endif /* __SIZEOF_LONG__ */
 860                 case __LINE__:
 861                         return ret; /* must be last */
 862                 /* note: do not set any defaults so as to permit holes above */
 863                 }
 864         }
 865         return ret;
 866 }
 867
 868 #define EXPECT_VFPRINTF(c, expected, fmt, ...)                          \
 869         ret += expect_vfprintf(llen, c, expected, fmt, ##__VA_ARGS__)
 870
 871 static int expect_vfprintf(int llen, size_t c, const char *expected, const char *fmt, ...)
 872 {
 873         int ret, fd, w, r;
 874         char buf[100];
 875         FILE *memfile;
 876         va_list args;
 877
 878         fd = memfd_create("vfprintf", 0);
 879         if (fd == -1) {
 880                 pad_spc(llen, 64, "[FAIL]\n");
 881                 return 1;
 882         }
 883
 884         memfile = fdopen(fd, "w+");
 885         if (!memfile) {
 886                 pad_spc(llen, 64, "[FAIL]\n");
 887                 return 1;
 888         }
 889
 890         va_start(args, fmt);
 891         w = vfprintf(memfile, fmt, args);
 892         va_end(args);
 893
 894         if (w != c) {
 895                 llen += printf(" written(%d) != %d", w, (int) c);
 896                 pad_spc(llen, 64, "[FAIL]\n");
 897                 return 1;
 898         }
 899
 900         fflush(memfile);
 901         lseek(fd, 0, SEEK_SET);
 902
 903         r = read(fd, buf, sizeof(buf) - 1);
 904         buf[r] = '\0';
 905
 906         fclose(memfile);
 907
 908         if (r != w) {
 909                 llen += printf(" written(%d) != read(%d)", w, r);
 910                 pad_spc(llen, 64, "[FAIL]\n");
 911                 return 1;
 912         }
 913
 914         llen += printf(" \"%s\" = \"%s\"", expected, buf);
 915         ret = strncmp(expected, buf, c);
 916
 917         pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n");
 918         return ret;
 919 }
 920
 921 static int run_vfprintf(int min, int max)
 922 {
 923         int test;
 924         int tmp;
 925         int ret = 0;
 926         void *p1, *p2;
 927
 928         for (test = min; test >= 0 && test <= max; test++) {
 929                 int llen = 0; /* line length */
 930
 931                 /* avoid leaving empty lines below, this will insert holes into
 932                  * test numbers.
 933                  */
 934                 switch (test + __LINE__ + 1) {
 935                 CASE_TEST(empty);        EXPECT_VFPRINTF(0, "", ""); break;
 936                 CASE_TEST(simple);       EXPECT_VFPRINTF(3, "foo", "foo"); break;
 937                 CASE_TEST(string);       EXPECT_VFPRINTF(3, "foo", "%s", "foo"); break;
 938                 CASE_TEST(number);       EXPECT_VFPRINTF(4, "1234", "%d", 1234); break;
 939                 CASE_TEST(negnumber);    EXPECT_VFPRINTF(5, "-1234", "%d", -1234); break;
 940                 CASE_TEST(unsigned);     EXPECT_VFPRINTF(5, "12345", "%u", 12345); break;
 941                 CASE_TEST(char);         EXPECT_VFPRINTF(1, "c", "%c", 'c'); break;
 942                 CASE_TEST(hex);          EXPECT_VFPRINTF(1, "f", "%x", 0xf); break;
 943                 CASE_TEST(pointer);      EXPECT_VFPRINTF(3, "0x1", "%p", (void *) 0x1); break;
 944                 case __LINE__:
 945                         return ret; /* must be last */
 946                 /* note: do not set any defaults so as to permit holes above */
 947                 }
 948         }
 949         return ret;
 950 }
 951
 952 static int smash_stack(void)
 953 {
 954         char buf[100];
 955         volatile char *ptr = buf;
 956         size_t i;
 957
 958         for (i = 0; i < 200; i++)
 959                 ptr[i] = 'P';
 960
 961         return 1;
 962 }
 963
 964 static int run_protection(int min, int max)
 965 {
 966         pid_t pid;
 967         int llen = 0, status;
 968
 969         llen += printf("0 -fstackprotector ");
 970
 971 #if !defined(_NOLIBC_STACKPROTECTOR)
 972         llen += printf("not supported");
 973         pad_spc(llen, 64, "[SKIPPED]\n");
 974         return 0;
 975 #endif
 976
 977 #if defined(_NOLIBC_STACKPROTECTOR)
 978         if (!__stack_chk_guard) {
 979                 llen += printf("__stack_chk_guard not initialized");
 980                 pad_spc(llen, 64, "[FAIL]\n");
 981                 return 1;
 982         }
 983 #endif
 984
 985         pid = -1;
 986         pid = fork();
 987
 988         switch (pid) {
 989         case -1:
 990                 llen += printf("fork()");
 991                 pad_spc(llen, 64, "[FAIL]\n");
 992                 return 1;
 993
 994         case 0:
 995                 close(STDOUT_FILENO);
 996                 close(STDERR_FILENO);
 997
 998                 prctl(PR_SET_DUMPABLE, 0, 0, 0, 0);
 999                 smash_stack();
1000                 return 1;
1001
1002         default:
1003                 pid = waitpid(pid, &status, 0);
1004
1005                 if (pid == -1 || !WIFSIGNALED(status) || WTERMSIG(status) != SIGABRT) {
1006                         llen += printf("waitpid()");
1007                         pad_spc(llen, 64, "[FAIL]\n");
1008                         return 1;
1009                 }
1010                 pad_spc(llen, 64, " [OK]\n");
1011                 return 0;
1012         }
1013 }
1014
1015 /* prepare what needs to be prepared for pid 1 (stdio, /dev, /proc, etc) */
1016 int prepare(void)
1017 {
1018         struct stat stat_buf;
1019
1020         /* It's possible that /dev doesn't even exist or was not mounted, so
1021          * we'll try to create it, mount it, or create minimal entries into it.
1022          * We want at least /dev/null and /dev/console.
1023          */
1024         if (stat("/dev/.", &stat_buf) == 0 || mkdir("/dev", 0755) == 0) {
1025                 if (stat("/dev/console", &stat_buf) != 0 ||
1026                     stat("/dev/null", &stat_buf) != 0 ||
1027                     stat("/dev/zero", &stat_buf) != 0) {
1028                         /* try devtmpfs first, otherwise fall back to manual creation */
1029                         if (mount("/dev", "/dev", "devtmpfs", 0, 0) != 0) {
1030                                 mknod("/dev/console", 0600 | S_IFCHR, makedev(5, 1));
1031                                 mknod("/dev/null",    0666 | S_IFCHR, makedev(1, 3));
1032                                 mknod("/dev/zero",    0666 | S_IFCHR, makedev(1, 5));
1033                         }
1034                 }
1035         }
1036
1037         /* If no /dev/console was found before calling init, stdio is closed so
1038          * we need to reopen it from /dev/console. If it failed above, it will
1039          * still fail here and we cannot emit a message anyway.
1040          */
1041         if (close(dup(1)) == -1) {
1042                 int fd = open("/dev/console", O_RDWR);
1043
1044                 if (fd >= 0) {
1045                         if (fd != 0)
1046                                 dup2(fd, 0);
1047                         if (fd != 1)
1048                                 dup2(fd, 1);
1049                         if (fd != 2)
1050                                 dup2(fd, 2);
1051                         if (fd > 2)
1052                                 close(fd);
1053                         puts("\nSuccessfully reopened /dev/console.");
1054                 }
1055         }
1056
1057         /* try to mount /proc if not mounted. Silently fail otherwise */
1058         if (stat("/proc/.", &stat_buf) == 0 || mkdir("/proc", 0755) == 0) {
1059                 if (stat("/proc/self", &stat_buf) != 0)
1060                         mount("/proc", "/proc", "proc", 0, 0);
1061         }
1062
1063         return 0;
1064 }
1065
1066 /* This is the definition of known test names, with their functions */
1067 static const struct test test_names[] = {
1068         /* add new tests here */
1069         { .name = "syscall",    .func = run_syscall    },
1070         { .name = "stdlib",     .func = run_stdlib     },
1071         { .name = "vfprintf",   .func = run_vfprintf   },
1072         { .name = "protection", .func = run_protection },
1073         { 0 }
1074 };
1075
1076 int is_setting_valid(char *test)
1077 {
1078         int idx, len, test_len, valid = 0;
1079         char delimiter;
1080
1081         if (!test)
1082                 return valid;
1083
1084         test_len = strlen(test);
1085
1086         for (idx = 0; test_names[idx].name; idx++) {
1087                 len = strlen(test_names[idx].name);
1088                 if (test_len < len)
1089                         continue;
1090
1091                 if (strncmp(test, test_names[idx].name, len) != 0)
1092                         continue;
1093
1094                 delimiter = test[len];
1095                 if (delimiter != ':' && delimiter != ',' && delimiter != '\0')
1096                         continue;
1097
1098                 valid = 1;
1099                 break;
1100         }
1101
1102         return valid;
1103 }
1104
1105 int main(int argc, char **argv, char **envp)
1106 {
1107         int min = 0;
1108         int max = INT_MAX;
1109         int ret = 0;
1110         int err;
1111         int idx;
1112         char *test;
1113
1114         argv0 = argv[0];
1115         environ = envp;
1116
1117         /* when called as init, it's possible that no console was opened, for
1118          * example if no /dev file system was provided. We'll check that fd#1
1119          * was opened, and if not we'll attempt to create and open /dev/console
1120          * and /dev/null that we'll use for later tests.
1121          */
1122         if (getpid() == 1)
1123                 prepare();
1124
1125         /* the definition of a series of tests comes from either argv[1] or the
1126          * "NOLIBC_TEST" environment variable. It's made of a comma-delimited
1127          * series of test names and optional ranges:
1128          *    syscall:5-15[:.*],stdlib:8-10
1129          */
1130         test = argv[1];
1131         if (!is_setting_valid(test))
1132                 test = getenv("NOLIBC_TEST");
1133
1134         if (is_setting_valid(test)) {
1135                 char *comma, *colon, *dash, *value;
1136
1137                 do {
1138                         comma = strchr(test, ',');
1139                         if (comma)
1140                                 *(comma++) = '\0';
1141
1142                         colon = strchr(test, ':');
1143                         if (colon)
1144                                 *(colon++) = '\0';
1145
1146                         for (idx = 0; test_names[idx].name; idx++) {
1147                                 if (strcmp(test, test_names[idx].name) == 0)
1148                                         break;
1149                         }
1150
1151                         if (test_names[idx].name) {
1152                                 /* The test was named, it will be called at least
1153                                  * once. We may have an optional range at <colon>
1154                                  * here, which defaults to the full range.
1155                                  */
1156                                 do {
1157                                         min = 0; max = INT_MAX;
1158                                         value = colon;
1159                                         if (value && *value) {
1160                                                 colon = strchr(value, ':');
1161                                                 if (colon)
1162                                                         *(colon++) = '\0';
1163
1164                                                 dash = strchr(value, '-');
1165                                                 if (dash)
1166                                                         *(dash++) = '\0';
1167
1168                                                 /* support :val: :min-max: :min-: :-max: */
1169                                                 if (*value)
1170                                                         min = atoi(value);
1171                                                 if (!dash)
1172                                                         max = min;
1173                                                 else if (*dash)
1174                                                         max = atoi(dash);
1175
1176                                                 value = colon;
1177                                         }
1178
1179                                         /* now's time to call the test */
1180                                         printf("Running test '%s'\n", test_names[idx].name);
1181                                         err = test_names[idx].func(min, max);
1182                                         ret += err;
1183                                         printf("Errors during this test: %d\n\n", err);
1184                                 } while (colon && *colon);
1185                         } else
1186                                 printf("Ignoring unknown test name '%s'\n", test);
1187
1188                         test = comma;
1189                 } while (test && *test);
1190         } else {
1191                 /* no test mentioned, run everything */
1192                 for (idx = 0; test_names[idx].name; idx++) {
1193                         printf("Running test '%s'\n", test_names[idx].name);
1194                         err = test_names[idx].func(min, max);
1195                         ret += err;
1196                         printf("Errors during this test: %d\n\n", err);
1197                 }
1198         }
1199
1200         printf("Total number of errors: %d\n", ret);
1201
1202         if (getpid() == 1) {
1203                 /* we're running as init, there's no other process on the
1204                  * system, thus likely started from a VM for a quick check.
1205                  * Exiting will provoke a kernel panic that may be reported
1206                  * as an error by Qemu or the hypervisor, while stopping
1207                  * cleanly will often be reported as a success. This allows
1208                  * to use the output of this program for bisecting kernels.
1209                  */
1210                 printf("Leaving init with final status: %d\n", !!ret);
1211                 if (ret == 0)
1212                         reboot(RB_POWER_OFF);
1213 #if defined(__x86_64__)
1214                 /* QEMU started with "-device isa-debug-exit -no-reboot" will
1215                  * exit with status code 2N+1 when N is written to 0x501. We
1216                  * hard-code the syscall here as it's arch-dependent.
1217                  */
1218                 else if (syscall(__NR_ioperm, 0x501, 1, 1) == 0)
1219                         __asm__ volatile ("outb %%al, %%dx" :: "d"(0x501), "a"(0));
1220                 /* if it does nothing, fall back to the regular panic */
1221 #endif
1222         }
1223
1224         printf("Exiting with status %d\n", !!ret);
1225         return !!ret;
1226 }